Screwing the pooch

Doing sweet fuck all.

In America - irrevocably fucking up.

In New Zealand - having sex with a dog.

Example

"Hey, you up for grabbing a beer at lunch"?

"Man, I've been screwing the pooch all morning, lets just go now"

"Hey, I just told my girlfriend she needs to shave her moustache, and she dumped me!"

"Man, you've really screwed the pooch this time."

"It was going 'bah' before, honest"